User-Agent

curl/8.15.0

first seen 2026-07-01 22:54 · last seen 2026-10-16 00:50 · JSON

Distinct clients per day (last 30 days, peak 1/day)

Distinct clients are counted by IP-hash per complete UTC day — unlike observation counts this is insensitive to one chatty client, but NAT merges clients and address rotation splits them.

Decomposed attributes

Browser / clientcurl 8.15.0
Noteinferred from the self-declared string — a claim, not a measurement; compare with the wire fingerprints above

Co-observed signals

Signals from other families seen in the same observation. A fingerprint spread thinly across many lower-layer signatures is a classic inconsistency signal.

TLS ClientHello (JA4)

fingerprintco-occurrences
t13d4113h2_8ae0994cad11_86f67be995ff7
t13d3013h2_1d37bd780c83_8537cf56674e Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.18.0.The fingerprint page shows the full measured match list. More on the catalog.3
t13d3513h2_bfa337485184_8d7351bd871b Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.18.0.The fingerprint page shows the full measured match list. More on the catalog.3
t13d3012h2_1d37bd780c83_882d495ac381 Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.21.0, curl 8.22.0, curl 8.23.0, +7 more.The fingerprint page shows the full measured match list. More on the catalog.2

HTTP request (JA4H)

fingerprintco-occurrences
ge20nn020000_5594a17e7e7e_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.7.1, curl 8.5.0, curl 8.13.0, +11 more.The fingerprint page shows the full measured match list. More on the catalog.15

HTTP/2 frames (Akamai)

fingerprintco-occurrences
3:100;4:65536;2:0|1048510465|0|m,s,a,p Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.13.0, curl 8.18.0, curl 8.21.0, +8 more.The fingerprint page shows the full measured match list. More on the catalog.15

TCP SYN (p0f)

fingerprintco-occurrences
4:55+9:0:1460:mss*44,10:mss,sok,ts,nop,ws:df,id+:04
4:52+12:0:1460:mss*44,10:mss,sok,ts,nop,ws:df,id+:03
4:53+11:0:1380:mss*47,10:mss,sok,ts,nop,ws:df,id+:02
4:46+18:0:1440:65535,6:mss,nop,ws,nop,nop,ts,sok,eol+1:df:02
4:45+19:0:1340:mss*48,10:mss,sok,ts,nop,ws:df,id+:01
4:42+22:0:1400:65535,8:mss,sok,ts,nop,ws::01
4:38+26:0:1400:65535,8:mss,sok,ts,nop,ws::01
4:106+22:0:1400:mss*44,8:mss,nop,ws,nop,nop,sok:df,id+:01

TCP SYN (JA4T)

fingerprintco-occurrences
64240_2-4-8-1-3_1460_107
64860_2-4-8-1-3_1380_102
65535_2-1-3-1-1-8-4-0-0_1440_62
65535_2-4-8-1-3_1400_82
64320_2-4-8-1-3_1340_101
64240_2-1-3-1-1-4_1400_81

Country

fingerprintco-occurrences
AU · Australia8
IR · Iran3
US · United States2
IT · Italy2

Network (ASN)

fingerprintco-occurrences
AS38195 · Superloop7
AS197207 · Mobile Communication Company of Iran PLC3
AS19318 · Interserver, Inc2
AS1267 · WIND TRE S.P.A.2
AS136557 · Host Universal Pty Ltd1

TLS supported groups

fingerprintco-occurrences
11ec,11eb,11ed,001d,0017,001e,0019,0018,0100,0101,0102,0103,0104 Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.18.0.The fingerprint page shows the full measured match list. More on the catalog.7
11ec,001d,0017,001e,0018,0019,0100,0101 Match?Exact match in Thumbprint's published controlled catalog captures: python-httpx 0.28.1, python-requests 2.34.2, curl 8.23.0, +4 more.The fingerprint page shows the full measured match list. More on the catalog.3